<?xml version="1.0"?>
<div class="add">

<b>thus </b>4 = 
 <a href="ordinal1.html#K1">succ</a> 3

<br/>.= 
3 <a href="xboole_0.html#K2">\/</a> <span class="p1"><a href="tarski.html#K1">{</a><span class="default">3</span><a href="tarski.html#K1">}</a></span>
<b>by </b><i><a class="ref" href="ordinal1.html#D1">ORDINAL1:def 1</a></i>
<br/>.= 
<span class="p1"><a href="enumset1.html#K2">{</a><span class="default">0,1,2,3</span><a href="enumset1.html#K2">}</a></span>
<b>by </b><i><a class="ref" href="card_1.html#D5" target="_self">Def5</a>, <a class="ref" href="enumset1.html#T46">ENUMSET1:46</a></i>
;<br/>


</div>
